Administration Console Online Help

JDBC Data Source: Configuration: General

Applications get a database connection from a data source by looking up
the data source on the Java Naming and Directory Interface (JNDI) tree and
then requesting a connection. The data source provides the connection to
the application from its pool of database connections.

This page enables you to define general configuration options for this
JDBC data source.

Enables multiple rows to be "prefetched" (that is, sent from the
server to the client) in one server access.

When an external client accesses a database using JDBC through
WebLogic Server, row prefetching improves performance by fetching
multiple rows from the server to the client in one server access.
WebLogic Server ignores this setting and does not use row
prefetching when the client and WebLogic Server are in the same
JVM.

If row prefetching is enabled, specifies the number of result
set rows to prefetch for a client.

The optimal prefetch size depends on the particulars of the
query. In general, increasing this number will increase
performance, until a particular value is reached. At that point
further increases do not result in any significant performance
increase. Very rarely will increased performance result from
exceeding 100 rows. The default value should be reasonable for most
situations.